Many Sudoku All Levels. 400 Collection Puzzles.

Great fitness and energy for the brain.- 100 Lighthouse Battleship puzzles 10x10 easy + 11x11 medium + 12x12 hard + 14x14 very hard levels.- 100 Yajilin puzzles 10x10 + 11x11 + 12x12 + 14x14.- 100 Calcudoku sudoku puzzles 9x9 - 25 Easy, 25 Medium, 25 Hard and 25 Very hard.- 100 Tridoku Sudoku puzzles 9x9 - 25 Easy, 25 Medium, 25 Hard and 25 Very hard. - unique puzzles+ 250 sudokus difficult level that can be downloaded and printed.+ 250 maze puzzles that can be downloaded and printed.- only 1 verified solution- all answers are at the end of the book- exclusive puzzles- a link to the surprise is at the end of the bookAn excellent book for free time and mind exploration.I hope you enjoy the book.Best regards, Basford Holmes